Patents
US 9830464 B2: Format preserving encryption
- Granted
- 2017-11-28
- Filed
- 2016-01-21 application 15003474
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Encrypting data without losing their format is important in computing systems, because many parties using confidential data rely on systems that require specific formatting for data. Information security depends on the systems and methods used to store and transmit data as well as the keys used to encrypt and decrypt those data. A policy broker is disclosed that maintains keys for clients in confidence, while providing cryptographically secure ciphertext as tokens that the clients may use in their systems as though they were the unencrypted data. Tokens are uniquely constructed for each client by the policy broker based on policies set by a receiving client detailing the formatting needs of their systems. Each client may communicate with other clients via the policy broker with the tokens and will send tokens unique to their system that the policy broker will translate into the tokens of the other party.
Source: PVGPATDIS, file of 2026-04-10 (ipg171128.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Passport Health Communications, Inc. 17 patents | US company or organization | Franklin, TN | PASSPORT HEALTH COMMUNICATIONS, INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Christopher Busch | Maple Grove, MN | 10 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G06F | Electric digital data processing | G06F21/62 | PVGPATDIS, file of 2026-04-10 |
| H04L | Transmission of digital information, e.g. telegraphic communication | H04L9/0618 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2020-05-20 | Name change Change of name | PASSPORT HEALTH COMMUNICATIONS, INC signed 2015-12-14 | EXPERIAN HEALTH, INC FRANKLIN, TN | 52715/695 | ECORSEXC, file of 2026-09-25 |
| 2016-01-21 | Assignment Assignment of assignor's interest | BUSCH, CHRISTOPHER GERHARD signed 2016-01-15 | PASSPORT HEALTH COMMUNICATIONS, INC. FRANKLIN, TN | 37553/434 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.